| 1 | /* Test string function in a transactionally executing RTM region. |
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| 2 | Copyright (C) 2021-2024 Free Software Foundation, Inc. |
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| 3 | This file is part of the GNU C Library. |
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| 4 | |
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| 5 | The GNU C Library is free software; you can redistribute it and/or |
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| 6 | modify it under the terms of the GNU Lesser General Public |
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| 7 | License as published by the Free Software Foundation; either |
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| 8 | version 2.1 of the License, or (at your option) any later version. |
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| 9 | |
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| 10 | The GNU C Library is distributed in the hope that it will be useful, |
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| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 13 | Lesser General Public License for more details. |
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| 14 | |
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| 15 | You should have received a copy of the GNU Lesser General Public |
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| 16 | License along with the GNU C Library; if not, see |
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| 17 | <https://www.gnu.org/licenses/>. */ |
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| 18 | |
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| 19 | #include <string.h> |
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| 20 | #include <x86intrin.h> |
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| 21 | #include <sys/platform/x86.h> |
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| 22 | #include <support/check.h> |
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| 23 | #include <support/test-driver.h> |
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| 24 | |
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| 25 | static int |
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| 26 | do_test_1 (const char *name, unsigned int loop, int (*prepare) (void), |
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| 27 | int (*function) (void)) |
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| 28 | { |
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| 29 | if (!CPU_FEATURE_ACTIVE (RTM)) |
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| 30 | return EXIT_UNSUPPORTED; |
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| 31 | |
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| 32 | int status = prepare (); |
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| 33 | if (status != EXIT_SUCCESS) |
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| 34 | return status; |
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| 35 | |
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| 36 | unsigned int i; |
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| 37 | unsigned int naborts = 0; |
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| 38 | unsigned int failed = 0; |
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| 39 | for (i = 0; i < loop; i++) |
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| 40 | { |
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| 41 | failed |= function (); |
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| 42 | if (_xbegin() == _XBEGIN_STARTED) |
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| 43 | { |
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| 44 | failed |= function (); |
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| 45 | _xend(); |
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| 46 | } |
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| 47 | else |
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| 48 | { |
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| 49 | failed |= function (); |
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| 50 | ++naborts; |
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| 51 | } |
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| 52 | } |
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| 53 | |
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| 54 | if (failed) |
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| 55 | FAIL_EXIT1 ("%s() failed" , name); |
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| 56 | |
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| 57 | if (naborts) |
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| 58 | { |
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| 59 | /* NB: Low single digit (<= 5%) noise-level aborts are normal for |
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| 60 | TSX. */ |
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| 61 | double rate = 100 * ((double) naborts) / ((double) loop); |
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| 62 | if (rate > 5) |
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| 63 | FAIL_EXIT1 ("TSX abort rate: %.2f%% (%d out of %d)" , |
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| 64 | rate, naborts, loop); |
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| 65 | } |
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| 66 | |
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| 67 | return EXIT_SUCCESS; |
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| 68 | } |
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| 69 | |
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| 70 | static int do_test (void); |
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| 71 | |
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| 72 | #include <support/test-driver.c> |
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| 73 | |
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